Welcome to Riverwalk OBGYN

Overall patient rating:

In 1979 Tristan Castaneda, MD started with a simple premise: Make available to every woman the health resources she needs to live a healthy, active, and long life. At the same time, educate each woman about the importance of preventative health measures. This same idea still drives us today, some 30 years later. The track record we’ve accumulated over the years speaks to our commitment to patients, their families, and the community at large. Both our medical and office staffs are second to none, who genuinely take an interest in individual patient’s needs. We think you’ll notice the difference immediately when you step foot inside our doors. We’d love to see you today to map out a health and wellness plan that’s tailored to your health history and needs.

About Our Practice

  • Providers

  • Services

  • Links And Forms

  • Locations

  • Contact Us

  • Alka Arya Degaetano

    DO
  • Ricardo Munoz

    MD
  • Stephanie Schaefer

    MD
  • Christina Simpson

    MD
  • Heather Williams

    MD

We Provide The Following Services

  • Obstetrics + Reproduction
  • Pregnancy Care and Delivery
  • Contraception
  • Ultrasound and Imaging
  • Gynecology + Wellness
  • Annual Exams
  • Menopause
  • Urogynecology

Riverwalk OBGYN: San Antonio Office

  • Monday: 8:30AM - 5:30PM
  • Tuesday: 8:30AM - 5:30PM
  • Wednesday: 8:30AM - 5:30PM
  • Thursday: 8:30AM - 5:30PM
  • Friday: 8:30AM - 5:30PM

Send Us a Message

    Patient Reviews

    Overall patient rating for Riverwalk OBGYN:

    Annual Well Woman Exam

    Dr Munoz takes the time at every appointment to talk and explain things to me thoroughly. He cares about his patients! I have referred my daughter, daughter-in-law, and granddaughter to Dr Munoz. We have all been very satisfied with our visits, all procedures and child deliveries. I recommend Dr Munoz to anyone.

    Annual Well Woman Exam

    she focuses on preventive measures

    Annual Well Woman Exam

    Dr Muñoz it’s been my Dr for over 30 years . He’s the best I will highly recommend Dr Munoz

    Gynecological Problem Visit

    Dr. Shaefer is kind , personable and is interested in you as a person. She is helpful and has good advice.

    Treatment / Procedure

    I was able to get to see the doctor as soon as I got to the appointment. I have nothing but good things to say about Dr. Munoz. He really is the best doctor ever. He always listens to me and provides me with the proper treatment.

    Ultrasound

    The staff is always nice and very professional.

    Annual Well Woman Exam

    Dr. Munoz and the staff are always professional. They make me feel comfortable during every visit. Dr. Munoz has been my OBGYN for several years, and he always treats me with compassion and professionalism. Every visit, he treats with the utmost care and respect. I greatly appreciate everything he does.

    Annual Well Woman Exam

    Dr.Munoz and his staff were very helpful

    Pap Smear

    It had been several years that I haven't seen Dr. Munoz and I was very pleased with my visit. Everything was handled very well as far as everything I needed to have done.

    Annual Well Woman Exam

    Dr. Schaefer is a compassionate and thorough doctor. I appreciate her attention to me physically. She has been a lifesaver and I'm so very grateful for her.